The Tuner tab shows your tuning in real time. It’s useful for:

  • An overall instrument tune-up
  • Finding out which octave you’re playing
  • Confirming that you’ve selected the correct Instrument Key

It’s in the style of a standard electronic tuner, but it has a number of extra features, and uses the same sophisticated Pitch Detection Algorithm as the Intonation tab.


Instrument Key

This should be set to your instrument’s natural key, so that the notes you see displayed are the ones you’re actually playing. You can set the Instrument Key at any time using the Settings Tab

Tuning Meter

The Tuning Meter shows how close you are to perfect tuning of zero in cents. Readings left of zero indicate Flat, and readings right of zero indicate Sharp.


The LEDs are an alternative way to see if the note you’re playing is in tune. If you’re within +/- 10 cents of zero, the green circle lights up, indicating good tuning. The left red arrow indicates Flat, and the right red arrow indicates Sharp.

Pitch and Octave

The Pitch and Octave of the note you’re playing, converted to your instrument’s key, so that it matches your fingering.

Unlike conventional tuners, which detect overtones and can’t tell which octave you’re playing, Intonation Station’s tuner uses the same sophisticated Pitch Detection Algorithm as the Intonation tab, and attempts to detect the exact octave you’re playing in according to standard convention (A4 = 440Hz).


The tuner uses either the Equal or Just Temperament, which you can choose in the Settings Tab. For a more detailed explanation of temperament, see About Intonation